"[Skinny dipping] is a tradition at my house!" the 50-year-old told Us Weekly on Wednesday at the Ides of March premiere in NYC. "It's funny. Some people skinny dip, but I always go upstairs and put a suit on and then I jump in the lake."

Clooney's costar Marisa Tomei told Conan O'Brien on Tuesday about skinny dipping in the lake at the actor's Italian estate. "Charlie Rose can be hot. [He, Evan Rachel Wood and I] had some hijinks over there," she said. "We would all end up skinny dipping!"

When Us asked Clooney about Tomei's comments, he quipped: "Let me tell you. First I got Walter Cronkite to jump in. Then I got David Gergen to jump in. And I used Walter Cronkite to get Gergen to jump in. And I used Marisa and Evan in the lake to get Charlie Rose to jump in."